JP2015098772A - Thermo expandable joint material for outside wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermo expandable joint material for an outside wall which is excellent in fire resistance and water resistance, being easy to be handled.SOLUTION: A thermo expandable joint material 10 for an outside wall includes a first thermo expandable joint material portion 12 which is almost cylindrical, and a second thermo expandable joint material portion 14 which is almost cylindrical and is connected to the first thermo expandable joint material portion 10. A thermo expandable fire resistant resin composition constituting the first and second thermo expandable joint material portions 12, 14 for the outside wall contains a resin component 100 wt. part, consisting of at least one selected from a group of EPDM, polybutene, and polybutadiene, thermo expandable graphite 5-200 wt. part, a boron-contained compound 20-200 wt. part, an antimony-containing compound 10-70 wt. part, and a vulcanizer 0.1-10 wt. part.

Description

  The present invention relates to a thermally expandable joint material for outer walls.

  FIG. 8 is a schematic cross-sectional view for explaining a conventional fireproof joint material for an outer wall.

  As shown in FIG. 8, a refractory material 101 made of inorganic fibers such as rock wool and ceramic blanket is installed on the joint 2 of the outer walls 1 and 1.

  A backup material 102 made of polyethylene foam in contact with the refractory material 101 is installed on the joint 2 of the outer walls 1 and 1.

  By injecting the sealing material 103 into the gap between the backup material 102 and the joint 2 of the outer walls 1 and 1, the fireproof joint structure of the outer wall shown in FIG. 8 is obtained.

  However, in the case of the refractory joint structure of the outer wall shown in FIG. 8, it is not easy to insert the refractory material 101 made of the inorganic fibers into the joint 2 of the outer walls 1 and 1, and there is a problem that it takes time for construction.

  On the other hand, a heat-expandable refractory resin composition that forms an expansion residue by heat such as fire as a building material is provided.

  Since this expansion residue can be used to prevent the spread of fire and the diffusion of smoke, molded articles containing a thermally expandable refractory resin composition are widely used for building materials.

  In addition, as an example of the thermally expandable refractory resin composition, a thermally expandable refractory resin composition obtained by blending an elastomer, neutralized thermally expandable graphite, a phosphorus-containing compound, etc. has been proposed. An elastomer foam having a closed cell structure obtained by molding a resin composition is said to be excellent in heat insulation and fire resistance (Patent Document 1).

  Since a molded body obtained by molding a thermally expandable refractory resin composition containing the phosphorus-containing compound is often placed in a building or the like for a long time, it is likely to be subject to a change in performance due to moisture.

  As one means to prevent the influence of moisture, a thermally expandable refractory material containing a phosphorus-containing compound is molded, and a thermally expandable refractory piece obtained by pulverizing or chipping the molded material is mixed with an elastomer and molded. The technique to do is proposed (patent document 2).

  According to this technique, the phosphorus-containing compound is confined inside the thermally expandable refractory piece, and a structure in which the elastomer is covered around the thermally expandable refractory piece is obtained. For this reason, the influence of the water | moisture content with respect to a phosphorus containing compound can be reduced.

  However, when an elastomer that easily absorbs moisture is selected as the elastomer, the moisture absorbed by the elastomer always comes into contact with the thermally expandable refractory piece, so that there still remains a problem that the phosphorus-containing compound is eluted.

WO2004 / 096369 JP 2005-220575 A

  An object of the present invention is to provide a thermally expandable joint material for an outer wall that has excellent fire resistance and is easy to handle.

  As a result of intensive studies by the present inventors in order to solve the above problems, a thermally expandable joint material for an outer wall including a thermally expandable refractory resin composition layer, which is at least one selected from the group consisting of EPDM, polybutene and polybutadiene. Outer wall formed by extrusion molding of a thermally expandable refractory resin composition layer comprising a thermally expandable refractory resin composition containing a resin component, a thermally expandable graphite, a boron-containing compound, an antimony-containing compound, and a vulcanizing agent It has been found that the thermally expandable joint for use is suitable for the purpose of the present invention.

  Furthermore, the present inventors have obtained a thermally expandable joint material for an outer wall composed of a first thermally expandable joint material portion and a second thermally expandable joint material portion that are aligned along the joint extending direction. It was found that the fire resistance was maintained for a longer time by forming a space between one joint material part and the outer wall, and the present invention was completed.

That is, the present invention is as follows.
[1] A thermally expandable joint material for an outer wall including a thermally expandable resin composition layer,
The outer wall thermally expandable joint material includes a first thermally expandable joint material portion, and a second thermally expandable joint material bonded to the first thermally expandable joint material portion directly or via a non-expandable joint material. With a material part,
The thermally expandable joint material for outer walls, wherein the first and second thermally expandable joint materials for the outer wall are composed of a thermally expandable refractory resin composition layer.
[2] 100 parts by weight of a resin component comprising at least one selected from the group consisting of EPDM, polybutene and polybutadiene as the thermally expandable refractory resin composition forming the thermally expandable refractory resin composition layer, thermally expandable graphite 5 to 200 parts by weight, boron-containing compound 20 to 200 parts by weight, antimony-containing compound 10 to 70 parts by weight, and vulcanizing agent 0.1 to 10 parts by weight,
The thermally expandable joint material for outer walls according to Item [1].
[3] The first thermally expandable joint material part is a substantially cylindrical, substantially semi-cylindrical, substantially elliptical column, substantially semi-elliptical note, or a substantially quadrangular prism, and the second thermally expandable joint material part is a substantially cylindrical, substantially A semi-cylinder, a substantially elliptical column, a substantially semi-elliptical note, or a substantially quadrangular column, provided that the first thermally expandable joint material portion and the second thermally expandable joint material portion are directly coupled to each other. The area of the joint surface between the thermally expandable joint material portion and the second thermally expandable joint material portion is smaller than the area of the maximum longitudinal section of the first thermally expandable joint material portion and the second thermally expandable joint material portion. Item [1] or [2] The thermally expandable joint material for outer walls according to [2].
[4] The first thermally expandable joint material portion and the second thermally expandable joint material portion are directly coupled, and the first thermally expandable joint material portion and the second thermally expandable joint material portion are substantially cylindrical. The outer wall thermally expandable joint material is for the outer wall according to item [1] or [2], wherein the first thermally expandable joint material portion and the second thermally expandable joint material portion are integrally formed. Thermally expandable joint material.
[5] A non-expandable joint material portion formed from a non-expandable fireproof resin composition is further provided between the first thermally expandable joint material portion and the second thermally expandable joint material portion, The diameter in the cross section perpendicular to the longitudinal direction of the non-expandable joint material portion is described in the item [1] or [2], which is smaller than the diameter in the cross section perpendicular to the longitudinal direction of the first and second thermally expandable joint material portions. Thermally expandable joint material for exterior walls.
[6] A method of arranging a thermally expandable joint material for outer wall for fire resistance of joints between outer walls,
The outer wall thermally expandable joint material according to any one of Items [1] to [5], wherein the first thermally expandable joint material portion and the second thermally expandable joint material portion are along a direction in which the joint extends. A method consisting of placing them in series.
[7] A method for arranging a thermally expandable joint material for outer wall for fire resistance of joints between outer walls,
The first thermally expandable joint material and the second thermally expandable joint material are separated from each other, and the first thermally expandable joint material and the second thermally expandable joint material extend along the direction in which the joint extends. Arranged in series,
The method, wherein the first thermally expandable joint material and the second thermally expandable joint material comprise a thermally expandable fireproof resin composition layer.
[8] The heat-expandable refractory resin composition forming the heat-expandable refractory resin composition layer comprises 100 parts by weight of a resin component consisting of at least one selected from the group consisting of EPDM, polybutene and polybutadiene, and heat-expandable graphite. The method according to Item [7], comprising 5 to 200 parts by weight, 20 to 200 parts by weight of a boron-containing compound, 10 to 70 parts by weight of an antimony-containing compound, and 0.1 to 10 parts by weight of a vulcanizing agent.
[9] A method for arranging a thermally expandable joint material for outer wall for fire resistance of joints between outer walls,
The first thermally expandable joint material and the second thermally expandable joint material are separated from each other, and the first thermally expandable joint material and the second thermally expandable joint material extend along the direction in which the joint extends. Arranged in series,
The method, wherein the first thermally expandable joint material and the second thermally expandable joint material comprise a thermally expandable fireproof resin composition layer.
[10] The heat-expandable refractory resin composition forming the heat-expandable refractory resin composition layer comprises 100 parts by weight of a resin component consisting of at least one selected from the group consisting of EPDM, polybutene and polybutadiene, and heat-expandable graphite. The method according to Item [9], comprising 5 to 200 parts by weight, 20 to 200 parts by weight of a boron-containing compound, 10 to 70 parts by weight of an antimony-containing compound, and 0.1 to 10 parts by weight of a vulcanizing agent.

  ADVANTAGE OF THE INVENTION According to this invention, it can provide providing the thermally expansible joint material for outer walls which is excellent in fire resistance and is easy to handle.

  The heat-expandable joint material for outer walls of the present invention includes a heat-expandable fireproof resin composition layer. For this reason, when the thermally expandable joint material for outer walls of the present invention is exposed to heat such as fire, the thermally expandable refractory resin composition layer expands to form an expansion residue.

  The expansion residue is flame retardant and can block the joint of the outer wall on which the outer wall thermally expandable joint material is installed. Since the expansion residue can prevent the flame and smoke generated by a fire or the like from spreading through the joint gap, the thermally expandable joint material for an outer wall of the present invention is excellent in fire resistance.

  Since the heat-expandable joint material for outer walls of the present invention has fire resistance, it can replace conventional fire-resistant materials made of inorganic fibers such as rock wool and ceramic blankets. Furthermore, the function as a backup material of the sealing material installed in the joint of an outer wall can also be fulfill | performed only by inserting the said thermally expansible joint material for outer walls into a joint.

  Further, the thermally expandable joint material for an outer wall of the present invention has flexibility. For this reason, it can install easily in the joint of the said outer wall. Further, when the outer wall thermally expandable joint material is installed on the joint of the outer wall, it can be brought into close contact with the joint of the outer wall, and the intrusion of moisture from the joint of the outer wall can be reduced.

  Further, when two or more types of thermally expandable graphite having different thermal expansion start temperatures of 30 ° C. or more are used for the thermally expandable refractory resin composition layer used for the thermally expandable joint material for an outer wall of the present invention, the outer wall When the thermally expandable joint material is exposed to heat such as fire, an expansion residue can be formed from a relatively low temperature. Further, even when the temperature is further increased after the expansion residue is formed, the expansion residue can be additionally formed, so that a thermally expandable joint material for an outer wall having excellent fire resistance can be provided.

  Further, since the thermally expandable joint material for the outer wall is composed of the first thermally expandable joint material portion and the second thermally expandable joint material portion, the fire resistance is longer than that of a single thermally expandable joint material of the same material. Sex is achieved.

(A) A schematic cross-sectional view of a thermally expandable joint material for an outer wall according to the first embodiment of the present invention, (b) a perspective view, (c) a relationship between a thermally expandable joint material for an outer wall, an outer wall, and a joint. FIG. 2 is a schematic partial cross-sectional view of a fireproof joint structure. (A) A schematic cross-sectional view of a thermally expandable joint material for an outer wall according to a second embodiment of the present invention, (b) a perspective view, (c) a relationship between a thermally expandable joint material for an outer wall, an outer wall, and a joint. FIG. 2 is a schematic partial cross-sectional view of a fireproof joint structure. (A) A schematic cross-sectional view of a thermally expandable joint material for an outer wall according to a third embodiment of the present invention, (b) a perspective view, (c) a relationship between the thermally expandable joint material for the outer wall, the outer wall, and the joint. FIG. 2 is a schematic partial cross-sectional view of a fireproof joint structure. (A) A schematic cross-sectional view of a thermally expandable joint material for an outer wall according to a fourth embodiment of the present invention, (b) a perspective view, and (c) a relationship between the thermally expandable joint material for the outer wall, the outer wall, and the joint. FIG. 2 is a schematic partial cross-sectional view of a fireproof joint structure. (A) A schematic cross-sectional view of a thermally expandable joint material for an outer wall according to a fifth embodiment of the present invention, (b) a perspective view, and (c) a relationship between the thermally expandable joint material for the outer wall, the outer wall, and the joint. FIG. 2 is a schematic partial cross-sectional view of a fireproof joint structure. (A) A schematic cross-sectional view of a thermally expandable joint material for an outer wall according to a sixth embodiment of the present invention, (b) a perspective view, (c) a relationship between the thermally expandable joint material for the outer wall, the outer wall, and the joint. FIG. 2 is a schematic partial cross-sectional view of a fireproof joint structure. The typical fragmentary sectional view of the fireproof joint structure for demonstrating the relationship between the thermally expansible joint material for outer walls which concerns on 7th Embodiment of this invention, an outer wall, and a joint. The schematic cross section for demonstrating the conventional fireproof joint material for outer walls.

1. Thermally expandable refractory resin composition First, the thermally expandable refractory resin composition used in the present invention will be described.

  The expandable resin composition used in the present invention comprises 100 parts by weight of a resin component, 5 to 200 parts by weight of thermally expandable graphite, 20 to 200 parts by weight of a boron-containing compound, 10 to 70 parts by weight of an antimony-containing compound, and a vulcanizing agent 0. .1 to 10 parts by weight are contained.

  The resin component contained in the thermally expandable refractory resin composition used in the present invention is at least one selected from the group consisting of EPDM, polybutene, and polybutadiene.

    As said EPDM used for this invention, the terpolymer with ethylene, propylene, and the diene monomer for bridge | crosslinking is mentioned, for example.

  The crosslinking diene monomer used in the EPDM is not particularly limited. For example, 5-ethylidene-2-norbornene, 5-propylidene-5-norbornene, dicyclopentadiene, 5-vinyl-2-norbornene, 5-methylene- Cyclic dienes such as 2-norbornene, 5-isopropylidene-2-norbornene, norbornadiene, 1,4-hexadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene, 5-methyl- Examples thereof include chain non-conjugated dienes such as 1,5-heptadiene, 6-methyl-1,5-heptadiene, and 6-methyl-1,7-octadiene.

The EPDM preferably has a Mooney viscosity (ML _{1 + 4} 100 ° C.) in the range of 35 to 100, more preferably in the range of 40 to 70.

  When the Mooney viscosity is 35 or more, the flexibility is excellent. Further, when the Mooney viscosity is 100 or less, it can be prevented from becoming too hard.

  The Mooney viscosity is a measure of viscosity measured by an EPDM Mooney viscometer.

  The EPDM preferably has a crosslinking diene monomer content in the range of 2.0 wt% to 20 wt%, and more preferably in the range of 5.0 wt% to 15 wt%.

  If it is 2.0% by weight or more, cross-linking between molecules proceeds, so that flexibility is excellent. If it is 20% by weight or less, weather resistance is excellent.

  Moreover, as said polybutadiene, a commercial item can be selected suitably and can be used. Examples of such polybutadiene include homopolymer types such as Claprene LBR-305 (manufactured by Kuraray Co., Ltd.) and copolymers of 1,2-bonded butadiene and 1,4-bonded butadiene such as Poly bd (manufactured by Idemitsu Kosan Co., Ltd.). And a copolymer type of ethylene, 1,4-bonded butadiene, and 1,2-bonded butadiene such as Kuraprene L-SBR-820 (manufactured by Kuraray Co., Ltd.).

  The polybutene preferably has a weight average molecular weight of 300 to 2000 as measured by a method based on ASTM D 2503.

  When the weight average molecular weight is less than 300, since the viscosity is low, the polybutene tends to ooze out on the surface of the molded product after molding. On the other hand, if it exceeds 2000, the viscosity tends to be high and extrusion molding tends to be difficult.

  Examples of the polybutene used in the present invention include “100R” (weight average molecular weight: 940), “300R” (weight average molecular weight: 1450) manufactured by Idemitsu Petrochemical Co., Ltd., “HV-100” (weight) manufactured by Nippon Petrochemical Co., Ltd. Average molecular weight: 970) and “H-100” (weight average molecular weight: 940) manufactured by AMOCO.

  The resin component used in the present invention is preferably one in which at least one of polybutene and polybutadiene is added to EPDM from the viewpoint of improving moldability.

  The addition amount of at least one of the polybutene and polybutadiene with respect to 100 parts by weight of the resin component is preferably in the range of 1 to 30 parts by weight, and more preferably in the range of 3 to 25 parts.

  When the thermally expandable refractory resin composition according to the present invention is molded, a foaming agent may be used when bubbles are contained in the molded body.

  Examples of the foaming agent include an azo compound-containing foaming agent, a nitroso compound-containing foaming agent, a sulfonyl / hydrazide-containing foaming agent, and a bicarbonate-containing foaming agent. Other examples include sodium bicarbonate, p-toluene sulfonyl semicarbazide, and microencapsulated blowing agent.

  Examples of the azo compound-containing blowing agent include azodicarbonamide and barium azodicarboxylate.

  Examples of the nitroso compound-containing foaming agent include N, N'-dinitrosopentamethylenetetramine.

  Examples of the blowing agent containing sulfonyl hydrazide include 4,4'-oxybis (benzenesulfonyl hydrazide), hydrazodicarbonamide, toluenesulfonyl hydrazide and the like.

  Examples of the bicarbonate-containing foaming agent include sodium bicarbonate.

  The said foaming agent can use 1 type, or 2 or more types.

  The microencapsulated foaming agent is one in which one or more of the foaming agents shown above are encapsulated in microcapsules. As the synthetic resin used for the microencapsulated foaming agent, for example, a thermoplastic synthetic resin that melts when it reaches a certain temperature or higher may be used.

  When the thermally expandable refractory resin composition is heated to a certain temperature or higher by adding the microencapsulated foaming agent to the thermally expandable refractory resin composition according to the present invention, the synthesis is performed. Since the resin melts, the thermally expandable refractory resin composition can be foamed.

  The amount of the foaming agent used relative to the resin component is usually in the range of 0.1 to 20 parts by weight and preferably in the range of 1.0 to 10 parts by weight with respect to 100 parts by weight of the resin component.

  Furthermore, when using the said foaming agent, a foaming adjuvant can also be used.

  By using the foaming aid, the decomposition temperature of the foaming agent is lowered, and foaming can be performed more efficiently.

  Examples of the foaming aid include organic amine, di-n-butylamine, aluminum sulfate, diethanolamine, urea, urea compound, salicylic acid, phthalic anhydride, benzoic acid, and diethylene glycol.

  The amount of the foaming aid used for the EPDM is preferably in the range of 0.01 to 10 parts by weight with respect to 100 parts by weight of the resin component, for example.

  Each of the foaming aids can be used alone or in combination of two or more.

  Next, the thermally expandable graphite used in the present invention will be described.

  The heat-expandable graphite is a conventionally known substance, and powders such as natural scaly graphite, pyrolytic graphite, and quiche graphite are mixed with an inorganic acid such as concentrated sulfuric acid, nitric acid, and selenic acid, and concentrated nitric acid, perchloric acid, peroxygen, and the like. A graphite intercalation compound is produced by treatment with a strong oxidizing agent such as chlorate, permanganate, dichromate, or hydrogen peroxide. The heat-expandable graphite produced is a crystalline compound that maintains the layered structure of carbon.

  The thermally expandable graphite used in the present invention can be neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, or the like with respect to the thermally expandable graphite obtained by the acid treatment. .

  Examples of the aliphatic lower amine include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, and butylamine.

  Examples of the alkali metal compound and alkaline earth metal compound include hydroxides such as potassium, sodium, calcium, barium, and magnesium, oxides, carbonates, sulfates, and organic acid salts.

  Specific examples of the thermally expandable graphite used in the present invention include “CA-60S” manufactured by Nippon Kasei Co., Ltd.

  When the particle size of the thermally expandable graphite is too fine, the degree of expansion of the graphite is small, and the foamability tends to decrease. Further, if it becomes too large, there is an effect in that the degree of expansion is large, but when kneaded with a resin, the dispersibility is poor and the moldability is lowered, and the mechanical properties of the obtained extruded product tend to be lowered. .

  For this reason, the particle size of the thermally expandable graphite is preferably in the range of 20 to 200 mesh.

  If the amount of the thermally expansive graphite added decreases, the fire resistance and foamability tend to decrease. Moreover, when it increases, it will become difficult to extrusion-mold, the surface property of the obtained molded object will worsen, and there exists a tendency for a mechanical physical property to fall. For this reason, the addition amount of the said thermally expansible graphite with respect to 100 weight part of said resin components is the range of 5-200 weight part.

  The amount of the thermally expandable graphite added is preferably in the range of 10 to 150 parts by weight.

  In the present invention, it is preferable to use two or more kinds of thermally expandable graphites having different expansion start temperatures of 30 ° C. or more.

  Here, the expansion start temperature means a temperature at which the expansion of the thermally expandable graphite can be observed when the thermally expandable graphite is heated, and can be measured by mechanical thermal analysis (TMA).

  The expansion start temperature of the thermally expandable graphite used in the present invention can be appropriately selected and used within the range of 150 ° C. to 400 ° C., but when using two or more types of thermally expandable graphite, Within this temperature range, those having an expansion start temperature different by 30 ° C. or more can be selected and used. Thermally expandable graphite having the same expansion start temperature can be used for the first thermally expandable joint material portion and the second thermally expandable joint material portion, but is higher by using graphite having different expansion start temperatures. Flameproof performance is obtained. In this case, it is preferable to use graphite having a low expansion start temperature on the heating side, that is, the side close to the heating location.

  During an actual fire, the entire outer wall is not necessarily heated without any bias, and usually a part of the outer wall is heated strongly, but the other part is not heated so much.

  For this reason, there are thermal expansion joint materials for outer walls that are directly exposed to flames such as fire, and other thermal expansion joint materials for outer walls that are indirectly heated through the outer walls.

  Although the temperature of the thermally expandable joint material for outer wall that is indirectly heated may not sufficiently rise, it is sufficient to use thermally expandable graphite having a high expansion start temperature for such a thermally expandable joint material for outer wall. In some cases, a large volume of expansion residue may not be formed, and the fire resistance performance expected for the thermally expandable joint material for outer walls may not be exhibited.

  If thermally expandable graphite having a low expansion start temperature is used, the fire resistance performance expected for the thermally expandable joint material for outer walls can be exhibited.

  However, problems also arise when using thermally expandable graphite having a low expansion start temperature.

  In the case of the thermally expandable joint material for outer walls using thermally expandable graphite having a low expansion start temperature, an expansion residue is formed at a relatively low temperature. If the outer wall is deformed due to heat from a fire or the like at the stage after the formation of the expansion residue is completed and a gap is generated around the joint of the outer wall, flame or smoke leaks from the gap. Become.

  By adopting two or more types of thermally expandable graphite having different expansion start temperatures of 30 ° C. or more, it is difficult for heat such as fire to be transmitted, and even when the outer wall thermally expandable joint material is not sufficiently heated, the expansion start temperature is relatively low. The thermally expandable graphite can form an expansion residue and block the joints on the outer wall.

  Further, when the temperature of the expansion residue is further increased, the heat-expandable graphite having a relatively high expansion start temperature can additionally form the expansion residue, so that a gap generated in the joint of the outer wall can be more reliably added. It can be occluded by the expansion residue formed.

  Next, the boron-containing compound used in the present invention will be described.

  Examples of the boron-containing compound used in the present invention include boron compounds such as boric acid, metaboric acid, orthoboric acid, hypoboric acid, boronic acid, borinic acid, and diboron trioxide, zinc borate, zinc metaborate, and orthoboron. Zinc oxide, zinc hypoborate, zinc boronate, zinc borate, calcium borate, calcium metaborate, calcium orthoborate, calcium hypoborate, calcium boronate, calcium borate, sodium borate, sodium metaborate (borax ), Sodium orthoborate, sodium hypoborate, sodium boronate, sodium borate, potassium borate, potassium metaborate, potassium orthoborate, potassium hypoborate, potassium boronate, potassium borate, cobalt metaborate, metaborate Barium, ammonium metaborate Include boron-containing salt of.

  From the viewpoint of handleability, the boron-containing compound used in the present invention is preferably a boric acid-containing salt.

  One or two or more of the boron-containing compounds can be used.

  When the addition amount of the boron-containing compound is decreased, the expansion during heating tends to be reduced. Moreover, when it increases, there exists a tendency for it to become difficult to shape | mold. For this reason, the addition amount of the said boron containing compound with respect to 100 weight part of said resin components is the range of 20-200 weight part.

  The amount of boron compound added is preferably in the range of 30 to 180 parts by weight.

  Next, the antimony-containing compound used in the present invention will be described.

  Examples of the antimony-containing compound used in the present invention include antimony oxide, antimonate, pyroantimonate, and the like.

  Examples of the antimony oxide include antimony trioxide and antimony pentoxide.

  Examples of the antimonate include sodium antimonate and potassium antimonate.

  Examples of the pyroantimonate include sodium pyroantimonate and potassium pyroantimonate.

  The antimony-containing compound used in the present invention is preferably antimony trioxide.

  The said antimony containing compound can use 1 type, or 2 or more types.

  When the amount of the antimony-containing compound is decreased, the flame retardancy tends to decrease. Moreover, when it increases, there exists a tendency for it to become difficult to shape | mold. For this reason, the addition amount of the antimony-containing compound with respect to 100 parts by weight of the resin component is in the range of 10 to 70 parts by weight.

  The addition amount of the antimony-containing compound is preferably in the range of 15 to 60 parts by weight.

  Next, the vulcanizing agent used in the present invention will be described.

  Examples of the vulcanizing agent include sulfur, sulfur chloride, sulfur dichloride, morpholine disulfide, alkylphenol disulfide, tetramethylthiuram disulfide, selenium dithiocarbamate, and the like.

  The vulcanizing agent is preferably sulfur or tetramethylthiuram disulfide.

  The said vulcanizing agent can use 1 type, or 2 or more types.

  When the amount of the vulcanizing agent is decreased, the stability during heating tends to be lowered. Moreover, when it increases, there exists a tendency for it to become difficult to shape | mold. For this reason, the addition amount of the vulcanizing agent with respect to 100 parts by weight of the resin component is in the range of 0.1 to 10 parts by weight.

  The addition amount of the vulcanizing agent is preferably in the range of 0.5 to 5 parts by weight.

  When using the vulcanizing agent, a vulcanization accelerator can be used in combination.

  Examples of the vulcanization accelerator include thiazole-containing vulcanization accelerator, guanidine-containing vulcanization accelerator, aldehyde amine-containing vulcanization accelerator, imidazoline-containing vulcanization accelerator, thiourea-containing vulcanization accelerator, and thiuram-containing vulcanization accelerator. , Dithioate-containing vulcanization accelerators, thiourea-containing vulcanization accelerators, xanthate-containing vulcanization accelerators, and the like.

  Examples of the thiazole-containing vulcanization accelerator include N-cyclohexyl-2-benzothiazole sulfenamide, N-oxydiethylene-2-benzothiazole sulfenamide, and the like.

  Examples of the guanidine-containing vulcanization accelerator include diphenyl guanidine and triphenyl guanidine.

  Examples of the aldehyde amine-containing vulcanization accelerator include an acetaldehyde / aniline condensate.

  Examples of the imidazoline-containing vulcanization accelerator include 2-mercaptoimidazoline.

  Examples of the thiourea-containing vulcanization accelerator include diethyl thiourea and dibutyl thiourea.

  Examples of the thiuram-containing vulcanization accelerator include tetramethylthiuram monosulfide and tetramethylthiuram disulfide.

  Examples of the dithioate-containing vulcanization accelerator include zinc dimethyldithiocarbamate and zinc diethyldithiocarbamate.

  Examples of the thiourea-containing vulcanization accelerator include ethylene thiourea and N, N′-diethylthiourea.

  Examples of the xanthate-containing vulcanization accelerator include zinc dibutylxatogenate.

  The said vulcanization accelerator can use 1 type, or 2 or more types.

  The amount of the vulcanization accelerator added to 100 parts by weight of the resin component is preferably in the range of 0.1 to 20 parts by weight. By using the vulcanization accelerator, vulcanization can proceed efficiently.

  The addition amount of the vulcanization accelerator is preferably in the range of 0.1 to 10 parts by weight.

  When the vulcanizing agent is used, a vulcanization aid can be used in combination.

Examples of the vulcanization aid include quinone dioxime vulcanization aids such as p-quinonedioxime, acrylic-containing vulcanization aids such as ethylene glycol dimethacrylate and trimethylolpropane trimethacrylate,
Examples include allyl-containing vulcanization aids such as diallyl phthalate and triallyl isocyanurate, maleimide-containing vulcanization aids divinylbenzene, zinc oxide, magnesium oxide, and zinc white.

  The amount of the vulcanization aid added to 100 parts by weight of the resin component is preferably in the range of 1 to 50 parts by weight. By using the vulcanization aid, vulcanization can be efficiently advanced.

  Next, the thermally expandable refractory resin composition according to the present invention can contain an inorganic filler.

Examples of the inorganic filler include metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites,
Hydrous minerals such as calcium hydroxide, magnesium hydroxide, aluminum hydroxide, hydrotalcite, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, barium carbonate and other metal carbonates, calcium sulfate, gypsum fiber , Calcium salts such as calcium silicate,
Silica, diatomaceous earth, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black , Graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, various magnetic powders, slag fiber, fly ash Etc.

  The inorganic filler used in the present invention is preferably a metal oxide, a hydrous inorganic substance, or a metal carbonate.

  The water-containing inorganic substance generates water by a dehydration reaction at the time of heating, an endotherm is generated by this water, a temperature rise is reduced, and high heat resistance is obtained, and an oxide remains as a heating residue, which is an aggregate. It is preferable from the point that the strength of the foamed refractory obtained by expanding and carbonizing the refractory resin composition is improved.

  Among the water-containing inorganic substances, magnesium hydroxide and aluminum hydroxide have different temperature ranges in which the dehydration effect is exerted, so the combined use of both increases the temperature range in which the dehydration effect is exerted, and more effective suppression of temperature rise. Since an effect is acquired, it is preferable to use magnesium hydroxide and aluminum hydroxide together.

  The metal carbonate is preferable in that the oxide remains as a heating residue and this acts as an aggregate, so that the strength of the foamed refractory obtained by expanding and carbonizing the refractory resin composition is improved.

  The said inorganic filler may be used independently or 2 or more types may be used together. The inorganic filler is preferably a combination of the hydrated inorganic substance and a metal carbonate. The water-containing inorganic substance and the metal carbonate are considered to contribute to the improvement of the strength of the combustion residue and the increase of the heat capacity because they function as an aggregate.

  The average particle size of the inorganic filler is preferably 0.5 to 100 μm, and more preferably 1 to 50 μm. If the average particle size of the inorganic filler is small, the inorganic filler aggregates and it becomes difficult to uniformly disperse it in the refractory resin composition. When the average particle size of the inorganic filler is large, the mechanical strength of the refractory resin composition is lowered.

  The inorganic filler is preferably used in combination of a large particle size and a small particle size, and the combined use of the inorganic filler maintains the mechanical strength of the thermally expandable refractory resin composition. An inorganic filler can be contained in the thermally expandable refractory resin composition at a high concentration.

  When the amount of the inorganic filler added is small, the fluidity of the thermally expandable refractory resin composition tends to be improved. Moreover, when it increases, there exists a tendency for the intensity | strength of the molded object of the said thermally expansible fireproof resin composition to improve. Therefore, the amount of the inorganic filler added to 100 parts by weight of the resin component is preferably in the range of 10 to 300 parts by weight, and more preferably in the range of 50 to 150 parts by weight.

  Moreover, a softening agent can be used for the heat-expandable refractory resin composition used in the present invention.

The softener is not particularly limited as long as it is a softener generally used when producing a thermoplastic resin molded article. Specifically, for example, phthalate ester softeners such as di-2-ethylhexyl phthalate (DOP), dibutyl phthalate (DBP), diheptyl phthalate (DHP), diisodecyl phthalate (DIDP),
Fatty acid ester softeners such as di-2-ethylhexyl adipate (DOA), diisobutyl adipate (DIBA), and dibutyl adipate (DBA);
Epoxidized ester softeners such as epoxidized soybean oil,
Polyester softeners such as adipic acid ester and adipic acid polyester,
Trimellitic acid ester softeners such as tri-2-ethylhexyl trimellitate (TOTM) and triisononyl trimellitate (TINTM),
Phosphate ester softeners such as trimethyl phosphate (TMP) and triethyl phosphate (TEP)
Examples include process oils such as mineral oil.

  The softener can be used alone or in combination of two or more.

  When the addition amount of the softening agent decreases, the extrusion moldability tends to decrease, and when the addition amount increases, the obtained molded body tends to be too soft. For this reason, the addition amount of the softening agent is in the range of 20 to 200 parts by weight with respect to 100 parts by weight of the thermally expandable refractory resin composition.

  Further, when the thermally expandable refractory resin composition used in the present invention contains a phosphorus compound excluding a phosphate ester softener, the extrusion moldability is lowered. For this reason, it is preferable not to contain the phosphorus compound except a phosphate ester softening agent. In addition, the phosphate ester softening agent which is the softening agent demonstrated previously can be contained.

  Phosphorus compounds that inhibit extrusion moldability are as follows.

Red phosphorus,
Various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate,
Metal phosphates such as sodium phosphate, potassium phosphate, magnesium phosphate,
Ammonium polyphosphates,
Examples thereof include compounds represented by the following chemical formulas.

In the above chemical formula, R ¹ and R ³ represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms.

R ² is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, or carbon. The aryloxy group of Formula 6-16 is represented.

  Examples of the compound represented by the chemical formula include methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methylpropylphosphonic acid, t-butylphosphonic acid, 2, 3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid , Diphenylphosphinic acid, bis (4-methoxyphenyl) phosphinic acid and the like.

  The ammonium polyphosphates are not particularly limited, and examples thereof include ammonium polyphosphate and melamine-modified ammonium polyphosphate.

  In the present invention, these phosphorus compounds that inhibit extrusion molding are not used.

  In addition, the thermally expandable refractory resin composition used in the present invention is generally used as necessary, as long as it does not impair its physical properties, heat stabilizers other than phosphorus compounds, lubricants, processing aids, Antioxidants, antistatic agents, pigments, crosslinking agents, crosslinking accelerators, and the like may be added.

Examples of the heat stabilizer include lead heat stabilizers such as tribasic lead sulfate, tribasic lead sulfite, dibasic lead phosphite, lead stearate, and dibasic lead stearate.
Organotin heat stabilizers such as organotin mercapto, organotin malate, organotin laurate, dibutyltin malate,
Examples thereof include metal soap heat stabilizers such as zinc stearate and calcium stearate.

  One or two or more heat stabilizers can be used.

Examples of the lubricant include waxes such as polyethylene, paraffin, and montanic acid, various ester waxes,
Organic acids such as stearic acid, ricinoleic acid,
Organic alcohols such as stearyl alcohol,
Examples include amide compounds such as dimethylbisamide.

  The said lubricant can use 1 type, or 2 or more types.

  Examples of the processing aid include chlorinated polyethylene, methyl methacrylate-ethyl acrylate copolymer, and high molecular weight polymethyl methacrylate.

  As said antioxidant, a phenol compound etc. are mentioned, for example.

  Examples of the antistatic agent include amino compounds.

  Examples of the pigment include inorganic pigments such as organic pigments such as azos, phthalocyanines, selenium, dye lakes, oxides, molybdenum chromates, carbon black, sulfides / selenides, and ferrocyanides. And pigments.

Examples of the crosslinking agent include sulfur. Examples of the crosslinking accelerator include tellurium diethyldithiocarbamate, N, N, N ′, N′-tetraethylthiuram disulfide, benzyl diethyldithiocarbamate, and the like.
[Specific Examples of Thermally Expandable Refractory Resin Composition]
Specific examples of the thermally expandable refractory resin composition used in the present invention are as follows.
(A) Resin composition comprising a resin component, thermally expandable graphite, boron-containing compound, antimony-containing compound and vulcanizing agent (b) Resin component, thermally expandable graphite, boron-containing compound, antimony-containing compound, vulcanizing agent and Resin composition comprising inorganic filler (c) Resin component, thermally expandable graphite, boron-containing compound, antimony-containing compound, vulcanizing agent, resin composition comprising inorganic filler and softener (d) Resin component, thermal expansion Resin composition comprising conductive graphite, boron-containing compound, antimony-containing compound, vulcanizing agent, inorganic filler, softener and foaming agent (e) at least one resin selected from the group consisting of (a) to (d) above For the composition, selected from the group consisting of heat stabilizers, lubricants, processing aids, foaming aids, vulcanization accelerators, vulcanization aids, antioxidants, antistatic agents, pigments, crosslinking agents and crosslinking accelerators. Little Resin composition obtained by adding at least one The heat-expandable refractory resin composition used in the present invention comprises the resin component, heat-expandable graphite, boron-containing compound, antimony-containing compound and vulcanizing agent, and necessary Accordingly, other additives contained therein can be obtained by melt-kneading using a known kneading apparatus.

  In addition, as a kneading apparatus, an extruder, a kneader mixer, a two roll, a Banbury mixer etc. are mentioned, for example.

  Moreover, the heat-expandable refractory resin composition used in the present invention can be preferably used for extrusion molding. By using the heat-expandable refractory resin composition and performing extrusion molding by melting at 50 to 80 ° C. with an extruder such as a single-screw extruder or a twin-screw extruder according to a conventional method, A long thermally expandable joint material for an outer wall having a structure including the composition layer can be obtained.

  The outer wall thermally expandable joint material of the present invention is obtained by cutting the long thermally expandable joint material for outer wall into an appropriate length according to the application. When used, the height of the joint material is usually adapted to the joint height.

As a thermally expansible joint material for outer walls of this invention, what is used for the joint of an outer wall is mentioned, for example. Examples of the use of the thermally expandable joint material for an outer wall include a use that is inserted into a joint between an outer wall and an outer wall and used as a backup material for supporting a sealing material installed on the joint. .
2. Hereinafter, an embodiment of a thermally expandable joint material for an outer wall of the present invention will be described with reference to the drawings. The description of the same part in each embodiment is omitted.

In this specification, “substantially cylindrical” refers to a shape in which the appearance of the cylinder is generally maintained, and a part of the outer periphery of the cylinder (not more than ¼ of the entire circumference) is adjacent to a member. This includes the case where they are joined and flattened. The “substantially semi-cylinder” refers to a shape in which the appearance of a semi-cylinder having a central angle of approximately 180 degrees is generally maintained. The “substantially elliptic cylinder” refers to a shape in which the appearance of the elliptic cylinder is generally maintained, and a part of the outer periphery of the elliptic cylinder (1/4 or less of the entire circumference) is joined and flattened with adjacent members. This includes cases where The “substantially semi-cylindrical” refers to a shape in which the appearance of a semi-elliptical column having a central angle of about 180 degrees is generally maintained.
(First embodiment)
Fig.1 (a) is a schematic cross section of the thermally expansible joint material 10 for outer walls, (b) is a perspective view. The outer wall thermally expandable joint material 10 includes a substantially cylindrical first thermally expandable joint material portion 12 formed from a thermally expandable refractory resin composition, and a substantially cylindrical first layer formed from a thermally expandable refractory resin composition. Two thermally expandable joint material portions 14. Here, the thermally expandable refractory resin composition forming the thermally expandable joint materials 12 and 14 is the same material, and the thermally expandable joint materials 12 and 14 for the outer wall are extruded by integral molding. The diameter D _{1 in the} cross section perpendicular to the longitudinal direction of the first thermally expandable joint material portion 12 is equal to the diameter D ₂ in the cross section perpendicular to the longitudinal direction of the second thermally expandable joint material portion 14. The first outer wall thermally expandable joint material 12 and the second outer wall thermally expandable joint material 14 are joined by a joint surface 16. Here, the length l _{1 in the} cross section perpendicular to the longitudinal direction of the joint surface 16 is smaller than the diameter D ₁ and the diameter D ₂ . That is, the area of the joint surface 16 is smaller than the areas of the maximum longitudinal cross sections of the first outer wall thermally expandable joint material 12 and the second outer wall thermally expandable joint material 14.

  In the fireproof joint structure of FIG. 1 (c), a thermally expandable joint material 10 for an outer wall is inserted into a joint 2 between two outer walls 1 made of a lightweight cellular concrete plate or the like, and a thermally expandable joint material 10 for an outer wall is inserted. And the sealing material 3 can be obtained by injecting the sealing material 3 into a space surrounded by the thermally expandable joint material 10 for the outer wall and the two outer walls 1. The thermally expandable joint material 10 for the outer wall functions as a backup agent for the sealing material 3.

And d (distance between the words the outer wall 1) joint second width, the diameter D ₂ of a first diameter D ₁ of the thermally expandable joint material portion 12 and a second thermally expandable joint material portion 14 is adapted . That is, since the first and second thermally expandable joint material parts 12 and 14 have flexibility, the diameter D ₁ of the _first thermally expandable joint material part 12 and the second thermally expandable joint material part 14 The diameter D ₂ may be slightly larger than or equal to the length d of the joint 2, and the first thermally expandable joint material portion 12 and the second thermally expandable joint material portion 14 are in contact with the outer walls 1 on both sides. Placed in the state. In this state, since the length L _{1 in the} cross section perpendicular to the longitudinal direction of the joint surface 16 is smaller than the diameter D ₁ and the diameter D ₂ , the outer wall 1 and the first and second thermally expandable joint material portions 12, 14. A space S is formed between the two.

  When heat such as flame is generated on the upper side of the drawing, the heat transmitted through the ceiling 3 first reaches the first thermally expandable joint material portion 12. The first thermally expandable joint material portion 12 is expanded by heat, and a residue generated by the expansion closes the joint 2. Next, since there is a space S between the outer wall 1 and the first and second thermally expandable joint material portions 12, 14, a certain time is left from the first thermally expandable joint material portion 12, Heat reaches the second thermally expandable joint material portion 14. The second thermally expandable joint material portion 14 is expanded by heat, and the residue generated by the expansion further closes the joint 2.

Thus, according to 1st Embodiment of this invention, since the joint material 10 foams and expand | swells with a time difference, the penetration | invasion of a fire can be delayed for a long time.
(Second Embodiment)
2A is a schematic cross-sectional view of the thermally expandable joint material 20 for outer wall, and FIG. 2B is a perspective view. The outer wall heat-expandable joint material 20 includes a substantially cylindrical first heat-expandable joint material portion 22 formed from a heat-expandable refractory resin composition, and a substantially rectangular first member formed from the heat-expandable refractory resin composition. Two thermally expandable joint material portions 24. Here, the thermally expandable refractory resin composition forming the thermally expandable joint materials 22 and 24 is the same material, and the thermally expandable joint materials 22 and 24 for the outer wall are extruded by integral molding. The diameter D _{3 in the} cross section perpendicular to the longitudinal direction of the first thermally expandable joint material portion 22 is larger than the length L _{1 in the} cross section perpendicular to the longitudinal direction of the second thermally expandable joint material portion 24. The first outer wall thermally expandable joint material 22 and the second outer wall thermally expandable joint material 24 are joined at a contact point P ₁ .

  In the fireproof joint structure of FIG. 2 (c), an outer wall thermally expandable joint material 20 is inserted into the joint 2 between the two outer walls 1, and the outer wall thermally expandable joint material 20 and the outer wall thermally expandable joint material. It can be obtained by injecting the sealing material 3 into a space surrounded by 20 and the two outer walls 1. The outer wall thermally expandable joint material 20 functions as a backup agent for the sealing material 3.

And d (distance between the words the outer wall 1) of the width joint 2, the diameter D ₃ of the first heat expandable joint material portion 22 is adapted. That is, since the first thermally expandable joint material portion 22 has flexibility, the diameter D ₁ of the first thermally expandable joint material portion 22 is slightly larger than or equal to the length d of the joint 2. The first thermally expandable joint material portion 22 is arranged in contact with the outer walls 1 on both sides. In this state, a space S is generated between the outer wall 1 and the first and second thermally expandable joint material portions 12 and 14.

The action when heat such as flame is generated on the upper side of the drawing is the same as that described in the first embodiment. That is, the heat transmitted through the sealing 3 first reaches the first thermally expandable joint material portion 22, and after a certain period of time from the first thermally expandable joint material portion 22, the second thermally expandable joint material. Part 24 is reached. Thus, according to 2nd Embodiment of this invention, since the joint material 20 foams and expand | swells by a time difference, the penetration | invasion of a fire can be delayed for a long time.
(Third embodiment)
FIG. 3A is a schematic cross-sectional view of the thermally expandable joint material 30 for the outer wall, and FIG. 3B is a perspective view. The outer wall heat-expandable joint material 30 is a substantially semi-elliptical first heat-expandable joint material portion 32 formed from a heat-expandable refractory resin composition, and a substantially cylinder formed from a heat-expandable refractory resin composition. The second thermally expandable joint material portion 34 is provided. Here, the thermally expandable refractory resin composition forming the thermally expandable joint materials 32 and 34 is the same material, and the thermally expandable joint materials 32 and 34 for the outer wall are extruded by integral molding. The length L _{2 in the} cross section perpendicular to the longitudinal direction of the first thermally expandable joint material portion 32 is equal to the diameter D ₄ in the cross section perpendicular to the longitudinal direction of the second thermally expandable joint material portion 34. A first outer wall for thermally expandable joint member 32 and the second outer wall for thermally expandable joint member 34 are joined at the junction P _2.

  In the fireproof joint structure of FIG. 3C, the outer wall thermally expandable joint material 30 is inserted into the joint 2 between the two outer walls 1, and the outer wall thermally expandable joint material 30 and the outer wall thermally expandable joint 30. And the sealing material 3 can be obtained by injecting the sealing material 3 into a space surrounded by the two outer walls 1. The outer wall thermally expandable joint material 30 functions as a backup agent for the sealing material 3.

The width d of the joint 2 (that is, the distance between the outer walls 1), the length L _{2 of} the first thermally expandable joint material portion 32, and the diameter D ₄ of the second thermally expandable joint material portion 34 are matched. Yes. That is, since the first thermally expandable joint material portion 32 has flexibility, the length L ₂ of the first thermally expandable joint material portion 32 and the diameter D ₄ of the second thermally expandable joint material portion 34 are as follows. The length d of the joint 2 may be slightly larger or the same, and the first and second thermally expandable joint members 32 and 34 are arranged in contact with the outer walls 1 on both sides. In this state, a space S is generated between the outer wall 1 and the first and second thermally expandable joint material portions 32 and 34.

The action when heat such as flame is generated on the upper side of the drawing is the same as that described in the first embodiment. That is, the heat transmitted through the sealing 3 first reaches the first thermally expandable joint material portion 22, and after a certain period of time from the first thermally expandable joint material portion 32, the second thermally expandable joint material. Part 34 is reached. Thus, according to 3rd Embodiment of this invention, since the joint material 30 foams and expand | swells by a time lag, invasion of a fire can be delayed for a long time.
(Fourth embodiment)
FIG. 4A is a schematic cross-sectional view of the thermally expandable joint material 40 for an outer wall, and FIG. 4B is a perspective view. The outer wall thermally expandable joint material 40 includes a substantially cylindrical first thermally expandable joint material portion 42 formed from a thermally expandable refractory resin composition, and a substantially cylindrical first layer formed from a thermally expandable refractory resin composition. 2 thermal expandable joint material portions 44 and a substantially cylindrical third thermally expandable joint material portion 46 formed of a heat expandable refractory resin composition. Here, the thermally expandable refractory resin composition forming the thermally expandable joint materials 42, 44, 46 is the same material, and the thermally expandable joint materials 42, 44, 46 for the outer wall are extruded by integral molding. The diameter D ₅ in the cross section perpendicular to the longitudinal direction of the first thermally expandable joint material portion 42, the diameter D _{6 in} the cross section perpendicular to the longitudinal direction of the second thermally expandable joint material portion 44, and the third thermal expansion. It is equal to the diameter D ₇ in the cross section perpendicular to the longitudinal direction of the joint material portion 46. The first outer wall thermally expandable joint material 42 and the second outer wall thermally expandable joint material 44 are joint surfaces 47, and the second outer wall thermally expandable joint material 44 and the third outer wall thermally expandable joint material 44. The joint material 46 is joined at the joint surface 48. Here, the lengths l ₂ and l ₃ in the cross section perpendicular to the longitudinal direction of the joint surfaces 47 and 48 are smaller than the diameters D ₅ , D ₆ and D ₇ . That is, the area of the joint surfaces 47 and 48 is smaller than the area of the longitudinal section of the first to third outer wall thermally expandable joint materials 42, 44 and 46.

  The fire-resistant joint structure of FIG. 3 (c) inserts the outer wall thermally expandable joint material 40 into the joint 2 between the two outer walls 1, and the outer wall thermally expandable joint material 40 and the outer wall thermally expandable joint material. It can be obtained by injecting the sealing material 3 into a space surrounded by 40 and the two outer walls 1. The outer wall thermally expandable joint material 40 functions as a backup agent for the sealing material 3.

The width of the joint 2 (that is, the distance between the outer walls 1) d and the diameters D ₅ , D ₆ and D ₇ of the first to third thermally expandable joint material portions 42, 44 and 46 are matched. In other words, the diameter D ₅ of the first to third heat-expandable joint material portion 42, 44, 46 for the first to third heat-expandable joint material portion 42, 44, 46 having flexibility, D ₆ and D ₇ May be slightly larger than or the same as the length d of the joint 2, and the first to third thermally expandable joint material portions 42, 44, 46 are arranged in contact with the outer walls 1 on both sides. In this state, since the lengths l ₂ and l ₃ in the cross section perpendicular to the longitudinal direction of the joint surfaces 47 and 48 are smaller than the diameters D ₅ , D ₆ and D ₇ , the outer wall 1 and the first to third thermal expansions. A space S is formed between the joint material portions 42, 44 and 46.

The action when heat such as flame is generated on the upper side of the drawing is the same as that described in the first embodiment. That is, the heat transmitted through the ceiling 3 is transmitted to the first, second, and third thermally expandable joint material portions with a time difference. Thus, according to 4th Embodiment of this invention, since the joint material 30 foams and expand | swells by a time lag, invasion of a fire can be delayed for a long time.
(Fifth embodiment)
Fig.5 (a) is a schematic cross section of the thermally expansible joint material 50 for outer walls, (b) is a perspective view. The outer wall thermally expandable joint material 50 includes a substantially cylindrical first thermally expandable joint material portion 52 formed from a thermally expandable refractory resin composition, and a substantially cylindrical non-expandable joint material formed from a non-expandable refractory resin composition. An expandable joint material portion 54 and a substantially cylindrical second thermally expandable joint material portion 56 formed from a thermally expandable refractory resin composition are provided. The thermally expandable refractory resin compositions of the first outer wall thermally expandable joint material 50 and the second thermally expandable joint material portion 56 are as described in the first to third embodiments, but in this embodiment, The material of the non-intumescent joint material portion 54 is different, for example, polycarbonate, hard urethane, soft urethane, urethane foam, polyimide, polyethylene terephthalate, polyamide, polystyrene, polystyrene foam, epoxy resin, polyvinyl chloride, polyvinyl chloride foam. Materials generally used as heat insulating materials such as phenol resin, phenol foam, cellulose foam, concrete, ceramic, glass wool, rock wool, gypsum, calcium silicate, carbonized foam cork, glass and glass foam are preferred. The first to third joint materials 52, 54, and 56 are joined at the contacts P ₃ and P ₄ by welding.

The diameter D _{8 in the} cross section perpendicular to the longitudinal direction of the first thermally expandable joint material portion 52 and the diameter D ₁₀ in the cross section perpendicular to the longitudinal direction of the second thermally expandable joint material portion 56 are equal, and the non-expandable joint The diameter D ₉ in the cross section perpendicular to the longitudinal direction of the material portion 54 is smaller than the diameter D ₈ and the diameter D ₁₀ .

  In the fireproof joint structure of FIG. 5C, the outer wall thermally expandable joint material 50 is inserted into the joint 2 between the two outer walls 1, the outer wall thermally expandable joint material 50, and the outer wall thermally expandable joint material. It can be obtained by injecting the sealing material 3 into a space surrounded by 50 and the two outer walls 1. The outer wall thermally expandable joint material 50 functions as a backup agent for the sealing material 3.

And d (distance between the words the outer wall 1) of the width joint 2, the diameter D ₈ and D ₁₀ of the first and second thermally expandable joint material portion 52, 56 is adapted. That is, since the first and second thermally expandable joint material portions 52 and 56 have flexibility, the diameters D ₈ and D ₁₀ of the first and second thermally expandable joint material portions 52 and 56 are the length d of the joint 2. It may be slightly larger or the same, and the first and second thermally expandable joint material portions 52 and 56 are arranged in contact with the outer walls 1 on both sides. In this state, a space S is generated between the first to third joint materials 52, 54, and 56.

The action when heat such as flame is generated on the upper side of the drawing is the same as that described in the first embodiment. That is, the heat transmitted through the ceiling 3 is transmitted to the first, second, and third joint material portions 52, 54, and 56 with a time difference. Thus, according to 5th Embodiment of this invention, since the joint material 50 foams and expand | swells by a time difference, the penetration | invasion of a fire can be delayed for a long time. Note that the fifth embodiment may be modified as follows.
(Sixth embodiment)
FIG. 6A is a schematic cross-sectional view of a thermally expandable joint material 60 for an outer wall, and FIG. 6B is a perspective view. The outer wall heat-expandable joint material 60 includes a substantially cylindrical first heat-expandable joint material portion 62 formed from a heat-expandable refractory resin composition, and a substantially cylindrical first member formed from a heat-expandable refractory resin composition. Two thermally expandable joint material portions 64. Here, the thermally expandable refractory resin composition forming the thermally expandable joint materials 62 and 64 is the same material, and the thermally expandable joint materials for outer wall 62 and 64 are extruded by integral molding. The diameter D _{11 in the} cross section perpendicular to the longitudinal direction of the first thermally expandable joint material portion 62 is equal to the diameter D ₁₂ in the cross section perpendicular to the longitudinal direction of the second thermally expandable joint material portion 64. The first outer wall thermally expandable joint material 22 and the second outer wall thermally expandable joint material 24 are joined at a contact point P ₅ .

The 1 · BR> off intumescent joint material portion 62 and a second thermally expandable joint material portion 64 is provided with respective hollow portions 62a and 64a, the length D ₁₃ and D ₁₄ of the hollow portion 62a and 64a are equal. When the hollow portions 62a and 64a exist inside the thermally expandable joint materials 62 and 64 for the outer wall, the thermally expandable joint material 60 for the outer wall can be easily deformed, so that the joint 2 for the outer wall 1 is used for the outer wall. It becomes easy to insert the thermally expandable joint material 60.

And d (distance between the words the outer wall 1) of the width joint 2, the diameter D ₁₁ and D ₁₂ of the first and second thermally expandable joint member portions 62, 64 is adapted. That is, the diameters D ₁₁ and D ₁₂ of the first and second thermally expandable joint material portions 62 and 64 may be slightly larger than or the same as the length d of the joint 2. The joint material portions 62 and 64 are arranged in contact with the outer walls 1 on both sides. In this state, a space S is generated between the first and second joint material portions 62 and 64.

  The action when heat such as flame is generated on the upper side of the drawing is the same as that described in the first embodiment. That is, the heat transmitted through the ceiling 3 is transmitted to the first and second joint material portions 62 and 64 with a time difference. Thus, according to the sixth embodiment of the present invention, the joint material 60 foams and expands with a time difference, so that the invasion of fire can be delayed for a longer time.

  In the case of the present embodiment, when the outer wall thermally expandable joint materials 62 and 64 have the same weight, when the hollow portion is larger and the outer diameter is larger, the outer wall joint material 62 and 64 is inserted into the joint portion of the outer wall. A large volume can be closed in the part.

  For this reason, among the thermally expandable joint materials for the outer wall of the cylindrical structure of the present invention, the second thermally expandable joint material for the second outer wall having the same weight relative to the arbitrarily selected first thermally expandable joint material for the outer wall Can identify a shape with improved fire resistance than the first thermally expandable joint material for a wall.

  Specifically, it is as follows.

The shape of the thermally expandable joint material for outer wall is cylindrical,
The radius of the outer diameter of the first outer wall thermally expandable joint material contained in the outer wall thermally expandable joint material is r ₁ ,
The hollow portion radius of the first thermally expandable joint material for outer wall is r ₂ ,
The specific gravity of the _first thermally expandable joint material for outer wall is d ₁ ,
The radius of the outer diameter of the second thermally expandable joint material for outer wall contained in the thermally expandable joint material for outer wall is r ₃ ,
The hollow radius of the second thermally expandable joint material for outer wall is r ₄ ,
The specific gravity of the _second thermally expandable joint material for outer wall is d2,
When the first thermally expandable joint material for outer wall and the second thermally expandable joint material for outer wall have the same weight,
r ₄ can be represented by (r ₃ ^ 2 + (d ₁ / d ₂ ) × (r ₂ ^ 2−r ₁ ^ 2)) ^ (1/2).

  Here, “^ 2” means square, and “^ (1/2)” means square root.

The hollow part radius r ₄ of the second thermally expandable joint material for outer wall, which is superior in fire resistance, compared to the first thermally expandable joint material for outer wall, can be calculated.

In addition, you may change said 1st-6th embodiment as follows.
The diameter or length of the first thermally expandable joint material portion 12, 22, 32, 42, 52, 62 and the diameter or length of the second thermally expandable joint material portion 14, 24, 34, 44, 56, 64 The size may be different.
-The diameter of the 1st thermal expansion joint material part 12,22,32,42,52,62 and the diameter of the 2nd thermal expansion joint material part 14,24,34,44,56,64 It is sufficient that one dimension is in contact with the outer walls 1 on both sides. Preferably, the first thermally expandable joint material portions 12, 22, 32, 42, 52, 62 may be in contact with the outer walls 1 on both sides thereof.
-1st thermal expansible joint material part 12,22,32,42,52,62, 2nd thermally expansible joint material part 14,24,34,44,56,64, and 3rd thermal expansibility The shape of the joint material portion 46 is not limited to the shape of the first to sixth embodiments. The first to third heat-expandable joint material portions may each be a substantially cylindrical shape, a substantially semi-cylindrical shape, a substantially elliptical column, a substantially semi-elliptical note, a substantially quadrangular column, or any other shape. However, when the first thermally expandable joint material portion and the second thermally expandable joint material portion are directly coupled, the joining of the first thermally expandable joint material portion and the second thermally expandable joint material portion is performed. The area of the surface is smaller than the area of the maximum longitudinal section of the first thermally expandable joint material portion and the second thermally expandable joint material portion, and is in contact with the area. Even in the case where the second thermally expandable joint material portion and the third thermally expandable joint material portion are directly coupled, the joint surface of the second thermally expandable joint material portion and the third thermally expandable joint material portion The area is smaller than the area of the maximum longitudinal section of the second thermally expandable joint material portion and the third thermally expandable joint material portion.
The first thermally expandable joint material portions 12, 22, 32, 42, 52, and 62 and the second thermally expandable joint material portions 14, 24, 34, 44, 56, and 64 are thermally expandable refractories having different compositions. You may form from a resin composition. For example, the first and second thermally expandable joint material portions may be formed from thermally expandable refractory resin compositions having different expansion temperatures.
In addition to the first and second thermally expandable joint material portions, the third thermally expandable joint material portion or a larger number of thermally expandable joint material portions may be provided as in the fourth embodiment. Good.
The first thermally expandable joint material portion and the second thermally expandable joint material portion may be directly coupled to each other as in the first, second, third, fourth, and sixth embodiments, Like in 5th Embodiment, you may couple | bond together via members other than thermally expansible joint material parts, such as a non-thermally expansible joint material part.
The first thermally expandable joint material portions 12, 22, 32, 42, 52, 62 and the second thermally expandable joint material portions 14, 24, 34, 44, 56, 64 are extruded by integral formation. Alternatively, when the compositions of the first and second thermally expandable joint material parts are different, extrusion molding may be performed by two-color molding, or separately formed first and second thermal expansions. The thermally expandable joint material for outer wall 10, 20, 30, 40, 50, 60 may be manufactured by bonding the joint material parts with bonding means such as welding or adhesive tape.
3. TECHNICAL FIELD The present invention also includes a method for disposing a thermally expandable joint material for an outer wall for fire resistance of joints between outer walls.

  In one embodiment, the method includes serially connecting the above-described thermally expandable joint material for an outer wall along a direction in which the first thermally expandable joint material portion and the second thermally expandable joint material portion extend. It consists of arranging to.

  In another embodiment, the separated first and second thermally expandable joint materials are placed on the joint. The configurations of the first thermally expandable joint material and the second thermally expandable joint material are the same as those of the first thermally expandable joint material portion and the second thermally expandable joint material described above. That is, as shown in FIG. 7, the first thermally expandable joint material 72 and the second thermally expandable joint material 74 are arranged in series along the direction in which the joint 2 extends while being separated from each other. The shape of the first thermally expandable joint material 72 and the second thermally expandable joint material 74 may be a substantially cylindrical shape, a substantially semi-cylindrical shape, a substantially elliptical column, a substantially semi-elliptical note, a substantially rectangular column, or any other shape, respectively. It may be.

  Also in this case, since there is a space S between the first thermally expandable joint material 72 and the second thermally expandable joint material 74, the heat transmitted through the sealing 3 is first the first thermally expandable joint material. After reaching 72, the second thermally expandable joint material 74 is reached after a certain time from the first thermally expandable joint material 72. Thus, since the joint materials 72 and 74 foam and expand with a time difference, the invasion of the fire can be delayed for a longer time.

  Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

Hereinafter, the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited at all by these Examples.
[Reference Examples 1 to 10]
A thermally expandable refractory resin composition having the composition shown in Table 1 was supplied to a kneader, melted and kneaded, and a sheet-like thermally expandable refractory resin composition having a thickness of 2 mm was obtained by calendering.
[Performance comparison test]
1. Test of expansion ratio The thickness T ₁ of the obtained sheet-like thermally expandable refractory resin composition was measured.

  Next, the sheet-like thermally expandable refractory resin composition was heated in an electric furnace at 600 ° C. for 30 minutes to obtain a residue after combustion.

The residue thickness T ₂ after combustion was measured, and the expansion ratio was calculated based on the following formula.

Expansion ratio (%) = 100 × thickness T ₂ of the foamed refractory layer / thickness T ₁ of the refractory resin composition
The results are shown in Table 1.
2. Residual hardness test after combustion A 0.25 cm ² indenter was pressed at a speed of 0.1 cm / sec on a post-combustion residue obtained by measurement of the expansion ratio using a micro compression tester. The residue was compressed and the stress at break was measured.

The results are shown in Table 1.
3. Moldability test The sheet-like heat-expandable refractory resin composition is supplied to an extrusion molding machine and melted at 50 to 80 ° C. in an extruder such as a single screw extruder or a twin screw extruder according to a conventional method. Carried out.

  A heat-expandable refractory resin composition having the composition shown in Table 1 is prepared, and each heat-expandable refractory resin composition is supplied to a single screw extruder (65 mm extruder manufactured by Ikekai Kikai Co., Ltd.) and extruded at a pressure of 150 t. By performing the above, a sheet-like molded product having a thickness of 2 mm and a thickness of 1 mm was extruded at a speed of 1 m / hr.

  Regarding the thickness accuracy of the sheet-like molded product, ○ when the thickness accuracy is plus or minus 0.2 mm or less, Δ when plus or minus 0.2 mm and plus or minus 0.4 mm or less, and plus or minus 0.4 mm. The case was marked with x. The results are also shown in Table 1.

  In Reference Examples 2 and 4 to 10, a foaming agent and a foaming aid were used. By using the foaming agent and the foaming aid, air bubbles can be included in the sheet-like molded product obtained by extrusion molding.

  Since the sheet-like molded product containing bubbles is small in density and excellent in flexibility, each of the thermal expansion properties shown in Reference Examples 2, 4 to 10 as the thermal expansion fire-resistant resin composition used in each of the following Examples The refractory resin composition is excellent. In particular, when EPDM and polybutadiene are used in combination as resin components, excellent performance is exhibited.

If the density of the heat-expandable refractory resin composition layer obtained by molding the heat-expandable refractory resin composition used in the present invention is in the range of 0.1 to 0.8 g / cm ³ , it is flexible. It is more preferable because of its excellent properties.

[Comparative Reference Examples 1-2]
A heat-expandable refractory resin composition having the composition shown in Table 1 was prepared, and an experiment was performed in exactly the same manner as in Reference Examples 1 to 10.

  The results are shown in Table 1.

[Examples 1 to 3, Comparative Example 1]
In Example 1, Example 2, and Comparative Example 1, the formulation of Reference Example 2 was used, and in Example 3, Reference Example 2 and Reference Example 10 were used. The composition is supplied to a kneader and melted and kneaded, and each thermally expandable refractory resin composition is supplied to a single screw extruder (Ikegai Machine Sales Co., Ltd., 65 mm extruder), and extrusion molding is performed at a pressure of 150 t. By using a mold, each joint material was created at a speed of 1 m / hr.
1. Fire resistance test Two lightweight aerated concrete plates (hereinafter referred to as ALC plates) of 2400 mm in length × 600 mm in width and 100 mm in plate thickness and cured by autoclave were stacked. The width of the joint portion was 10 mm, and the thermally expandable joint material of Examples 1 and 2 or Comparative Example 1 was inserted into the joint so that the non-heated side was 20 mm from the end of the ALC plate.

The test specimen was heated for 60 minutes in accordance with the standard heating curve of ISO834 and evaluated by the presence or absence of flame penetration.
Example 1
A thermally expansible joint material (D ₁ , D ₂ = 15 mm, density 0.3 g / cm ³ ) prepared as in the configuration of the first embodiment is applied with a double-sided tape as shown in FIG. A fire resistance test was conducted according to the above test method. The joint width was 10 mm. As a result, it was confirmed that there was no flame penetration even after 60 minutes.
Example 2
The thermally expandable joint material (D ₈ , D ₁₀ = 15 mm, density 0.3 g / cm ³ ) and the polycarbonate (D ₉ = 6 mm) prepared as in the configuration of the fifth embodiment are pasted with a double-sided tape. A heating test was conducted according to the above test method using a test body. The joint width was 10 mm. It was confirmed that there was no flame penetration even after 60 minutes. Example 3
The thermally expandable joint material prepared in Reference Example 2 (D ₁ = 15 mm, density 0.3 g / cm ³ ) prepared as in the configuration of the first embodiment, and the thermally expandable joint material prepared in Reference Example 10 (D ₂ = 15 mm, density 0.35 g / cm ³ ) is attached with double-sided tape as shown in FIG. 1, and the first thermally expandable joint material portion 12 which is the thermally expandable joint material created in Reference Example 2 is A fireproof test was conducted according to the above test method, with the test piece so that the second heat-expandable joint material portion 14, which is the heat-expandable joint material prepared in Reference Example 10, was on the non-heated side. The joint width was 10 mm. As a result, it was confirmed that there was no flame penetration even after 60 minutes.
Comparative Example 1
A single thermal expansion joint material (diameter 15 mm) was used as a test body, and a heating test was performed according to the above test method. The joint width was 10 mm. It was confirmed that the flame penetrated after 48 minutes.

  DESCRIPTION OF SYMBOLS 1 ... Outer wall, 2 ... Joint, 3 ... Sealing material 10, 20, 30, 40, 50, 60 ... Thermally expandable joint material for outer walls, 12, 22, 32, 42, 52, 62 ... First Thermally expandable joint material part for outer wall, 14, 24, 34, 44, 56, 64 ... second thermally expandable joint material part for outer wall, 54 ... non-expandable joint material part.

Claims (10)

A thermally expandable joint material for an outer wall including a thermally expandable resin composition layer,
The outer wall thermally expandable joint material includes a first thermally expandable joint material portion, and a second thermally expandable joint material bonded to the first thermally expandable joint material portion directly or via a non-expandable joint material. With a material part,
The thermally expandable joint material for outer walls, wherein the first and second thermally expandable joint materials for the outer wall are composed of a thermally expandable refractory resin composition layer.   The thermally expandable refractory resin composition forming the thermally expandable refractory resin composition layer is 100 parts by weight of a resin component consisting of at least one selected from the group consisting of EPDM, polybutene and polybutadiene, and 5 to 200 of thermally expandable graphite. The thermally expandable joint material for outer walls according to claim 1, comprising parts by weight, 20 to 200 parts by weight of a boron-containing compound, 10 to 70 parts by weight of an antimony-containing compound, and 0.1 to 10 parts by weight of a vulcanizing agent. The first thermally expansible joint material part is a substantially cylindrical, substantially semi-cylindrical, substantially elliptical column, substantially semi-elliptical note, or a substantially quadrangular prism, and the second thermally expansible joint material part is a substantially cylindrical, substantially semi-cylinder, It is a substantially elliptical cylinder, a substantially semi-elliptical note, or a substantially quadrangular prism, provided that the first thermal expansibility is obtained when the first thermally expansible joint material portion and the second thermally expansible joint material portion are directly coupled. The area of the joint surface between the joint material portion and the second thermally expandable joint material portion is smaller than the area of the maximum longitudinal section of the first thermally expandable joint material portion and the second thermally expandable joint material portion. Or the thermally expansible joint material for outer walls of 2.   The first thermally expandable joint material portion and the second thermally expandable joint material portion are directly coupled, and the first thermally expandable joint material portion and the second thermally expandable joint material portion are substantially cylindrical, and the outer wall The thermally expandable joint material for an outer wall according to claim 1 or 2, wherein the first thermally expandable joint material portion and the second thermally expandable joint material portion are integrally formed.   A non-expandable joint material part formed of a non-expandable fireproof resin composition is further provided between the first thermally expandable joint material part and the second thermally expandable joint material part, The diameter of the cross section perpendicular to the longitudinal direction of the joint material portion is smaller than the diameter of the cross section perpendicular to the longitudinal direction of the first and second thermally expandable joint material portions. Joint material. A method of disposing a thermally expandable joint material for outer walls for fire resistance of joints between outer walls,
The thermally expandable joint material for an outer wall according to any one of claims 1 to 5 is disposed in series along a direction in which the first thermally expandable joint material portion and the second thermally expandable joint material portion extend. A method that consists of doing. A method of disposing a thermally expandable joint material for outer walls for fire resistance of joints between outer walls,
The first thermally expandable joint material and the second thermally expandable joint material are separated from each other, and the first thermally expandable joint material and the second thermally expandable joint material extend along the direction in which the joint extends. Arranged in series,
The method, wherein the first thermally expandable joint material and the second thermally expandable joint material comprise a thermally expandable fireproof resin composition layer.   The thermally expandable refractory resin composition forming the thermally expandable refractory resin composition layer is 100 parts by weight of a resin component consisting of at least one selected from the group consisting of EPDM, polybutene and polybutadiene, and 5 to 200 of thermally expandable graphite. The method according to claim 7, comprising parts by weight, 20 to 200 parts by weight of a boron-containing compound, 10 to 70 parts by weight of an antimony-containing compound, and 0.1 to 10 parts by weight of a vulcanizing agent. A method of disposing a thermally expandable joint material for outer walls for fire resistance of joints between outer walls,
The first thermally expandable joint material and the second thermally expandable joint material are separated from each other, and the first thermally expandable joint material and the second thermally expandable joint material extend along the direction in which the joint extends. Arranged in series,
The method, wherein the first thermally expandable joint material and the second thermally expandable joint material comprise a thermally expandable fireproof resin composition layer.   The thermally expandable refractory resin composition forming the thermally expandable refractory resin composition layer is 100 parts by weight of a resin component consisting of at least one selected from the group consisting of EPDM, polybutene and polybutadiene, and 5 to 200 of thermally expandable graphite. The method according to claim 9, comprising parts by weight, 20 to 200 parts by weight of a boron-containing compound, 10 to 70 parts by weight of an antimony-containing compound, and 0.1 to 10 parts by weight of a vulcanizing agent.

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